Please carefully che dimens before you chase. Strainer outer dieter: 4.5”; Sper dieter: 3-3/8 inches. Fit for 3-1/2-inch kitchen sink drain The smooth rolled rim of the drain strainer will not scratch your hands or da your sinks. We increased the hardn of rubber rim of drain sperNot easy to fall off. Stainl Steel Kitchen Sink Strainer - Made of stainl steel (rust-free. Silicone). Kitchen drain plug/sper- Made of stainl steel and good silicone (non-,flexible and not deformed,effectively sping water) Strainer: 2mm dia holes. Micro-perforat can efficient anti-clogging and lets liquid flow selly. Kitchen sink sper effectively holding water in the sink for washing. Prevent your disposal from the da of the Food & Debris. Keep your drain work great. Avoid wasting time and money on repairing and dredging pipes..